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2
votes
1
answer
431
views
World file calculation when rotation is close to 90 degrees
I am trying to calculate a world file for an image given the following information. … (irrelevant)
both the D and B parameter get very large incorrect values.
However, I don't really see how to fix this as it seems an inevitable part of using a world file. …
2
votes
0
answers
332
views
formula to calculate geo-referencing paramerters
Now I want to generate world file parameters for overlapping two data. I am using DotSpatial (github DotSpatial) as an base library for rendering the GIS data. … How can I generate the required parameters programmatically?
Parameter details are here
I need something like below …
1
vote
0
answers
70
views
Adding Raster to ImageServer: What are the Geodata Transformation Parameters?
My original image file is accompanied by a world file, containing the six parameters of an affine transformation. … I want to use them in Add Raster's Geodata Transforms parameter to georeference my raster image. …
0
votes
Accepted
How to determine the UTM zone in a world file
So the answer to this is that the world file parameters can be any UTM zone you want. … Then the software will just assume the parameters in the world file are defined in the map projection you specified. …
1
vote
1
answer
1k
views
Georeference Raster File with WorldFile into an aerial photo using GDAL [duplicate]
PROBLEM:
I have a raster file in this case it is an ortomap:
http://imageshack.us/photo/my-images/703/ortofoto1.jpg/
and it has JGW (World File)
0.683772574816354
0.000000000000000
0.000000000000000 … What gdal console commands should I commit on those 3 files and what parameters should I consider?
(I was thinking gdal_translate/gdalwarp maybe) …
1
vote
0
answers
233
views
Reset raster extent in QGIS with Python
I have a raster layer with a corresponding world file. … An external program changes the translation parameters in the world file, so I reload the raster by calling
layer.triggerRepaint()
as described in this answer. …
0
votes
0
answers
184
views
Creating custom projection using provided Helmert Parameters and ArcMap?
I am based in South Africa and the firm I'm working for makes use of the Cape Lo23-based system, while the rest of the world around me has moved on to the WGS based Hartebeesthoek datum. … I've been provided with conversion parameters in a file as seen below:
Helmert transformation
Control file with common points:
LO23-WG23.txt
System: Hartebeesthoek Lo23
T10 -2268.780 …
5
votes
2
answers
5k
views
GDAL_TRANSLATE Assumes Picture is Orientated North? [closed]
I read over the translate docs again and there seem to be no parameters with which I can tell GDAL to read data about orientation using a 'world file.' … I will continue to work on projection because I have a few leads but this 'world file' business and image rotation I do not even know where to start. …
4
votes
0
answers
1k
views
Creating custom CRS based on local project parameters in QGIS?
The property lines were provided to us with a .prj file using NAD83 State Plane Coordinates. … In the past, we have utilized ArcGIS (or notepad) to create a projected local coordinate system based on our project parameters and assign its .prj to the data frame of our .shp file, and tell ArcGIS to …
0
votes
1
answer
891
views
Writing Python script tool for Data Driven Pages?
What I am trying to accomplish is exporting JPEGs with a world file that follow data driven pages. I would like to automate this process as much as possible, creating a tool for it. … Something with parameters that allow me to pick the folder, the file name,, the width, height, etc. So I did a test with an input for folder and file name. …
6
votes
Accepted
Creating .tfw world files from .tiff & coordinates in Excel?
From Wikipedia World file, with a real world file the generic meaning of the six parameters are
3.0384141414141403 A: x-component of the pixel width (x-scale)
0 D: y-component of … (width and height) you can compute the A,E,C,F parameters, but not D and B (usually 0, no rotation). …
0
votes
0
answers
488
views
Understanding TIFF file georeferencing
I am new to maps and ArcGIS field, and having some issues understanding the used georeferencing systems, I have a dem.tif file, when extracting information I get X and Y in very large number, I used osgeo … ,AUTHORITY["EPSG","9122"]]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",33],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER …
9
votes
1
answer
3k
views
Specify directories for use with gdaltindex
The majority of these files are Tiff's with a world file and have not yet been converted to geoTiffs. … It looks like I can use -skip_different_projection to take care of the projection issue, but my search hasn't turned up any parameters of gdaltindex to specify directories, so any help is much appreciated …
0
votes
0
answers
264
views
Filling Polygon with SVG File so it Will Appear Only One Time in QGIS 3.4.2
I have a layer that shows the world, without Antarctica and small islands.
This layer is made of five different polygons. … However I change the Texture width parameters the SVG was not fitting perfectly.
What is needed to be done in order of make it fit? …
8
votes
1
answer
5k
views
Manipulating Azimuthal Equidistant Projections in QGIS
This is what I have tried so far:
Added shapefile of world countries projected as Azimuthal Equidistant with Chicago as the center
Opened properties, metadata tab, copy proj4 parameter code
Went to settings … , custom projection, paste in proj4 code, changed the lat/lon from that of Chicago to that of Edinburgh
Saved shapefile of world countries, specified my new custom projection, added new file to map
My …